Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Give me a one-sentence summary of this text, please. 

Lowland forest
This type of forest is found at elevations of up to approximately 1000 metres within the tropical belt. Due to the high rainfall and constant warm temperatures, they provide the perfect environment for plants and animals and so contain a great diversity of life. Lowland rainforests contain the tallest trees of all the types of rainforest, with the largest variety of species. (Source: mongabay.com)
Response: Lowland forests exist in the tropical belt at elevations up to 1,000m, where warm, wet conditions support diverse flora and fauna and the biggest rainforest trees. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Explain the Water Cycle in one sentence.
user
The water cycle describes the continuous movement of water on, above, and below the surface of the Earth through processes like evaporation, condensation, and precipitation.
assistant